Emit map and mirror map? How can I texture emission and reflection?
I tried a simple test: I created a 600x200 pixel png file, with the left half pure black and the right half pure white. Created a new emission material in Cycles and set the color to 'Image Texture', then loaded the png image as the texture. I placed the material on a quad and set that quad perpendicular to a flat surface and rendered. The half textured with white acted exactly like a bright light, shining white light over my flat surface. The half textured in black emitted no apparent light. Looks to me like it just works.

The blend for this texture emission can be found here: 

The partial mirror is achievable by using a glossy BDSF shader with another UV-mapped texture feeding the 'Roughness' variable. I updated the blend to use this textured mirroring node setup. You can find it here: